Car vibrates when idle with engine on with dip in rev from 700rpm to 500 RPM

Tiny
AGNI
  • MEMBER
  • 2008 HONDA CIVIC
  • 2WD
  • AUTOMATIC
  • 22,000 MILES
I own a Honda Civic (auto transmission-1.6 l, driven 22000Km). Have serviced it 3 months ago with change in engine oil. Recently I have noticed a jarring/vibration when the engine is on but car is stationary which comes every 15 seconds or so and lasts for 1-3 seconds (as if the car is shuddering). This is associated with a drop in RPM from the baseline 700rpm to about 600 or may be occasionally 500rpm. When the shuddering stops the rpm is back to baseline. Dont feel a thing when the car is running. Still get about 9km/L in city roads. Would like your opinion please. Thanks.
Monday, March 7th, 2011 AT 11:36 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Symptoms indicates the idling is erratic and most common fult would be dirty throttle body and Idle Air Contropl valve. Have them cleaned and retest.

If problem persists, have the valve clearances checked/adjusted.
Was this
answer
helpful?
Yes
No
Monday, May 23rd, 2011 AT 4:18 PM

Please login or register to post a reply.

Related Engine Revs Up Content

Idle Air Control Motor Replacement
GUIDE
Idle Air Control Motor Replacement
The idle air control motor or idle speed control motor is designed to adjust the air flow into the intake manifold at engine idle. Engine idle speed is monitored by the PCM...
VIEW MORE